<template>
    <div class="cmt-container">
        <h3> 发表评论</h3>
        <hr>
    <textarea placeholder="请输入要BB的内容（做多吐槽120字）" maxlength="120" v-model="msg"></textarea>
     <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
     
    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="item.add_time">
        <div class="cmt-title">
          第{{ i+1 }}楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
        </div>
        <div class="cmt-body">
          {{ item.content === 'undefined' ? '此用户很懒，嘛都没说': item.content }}
        </div>
      </div>
       <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
    </div>
</template>
<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      pageIndex: 1, // 默认展示第一页数据
      comments: [] ,// 所有的评论数据
      msg:''
    };
  },
  created() {
    this.getComments();
  },
  methods:{
  getComments() {
      // 获取评论
      this.$http.get("http://027xin.com:8899/api/getcomments/" + this.id + "?pageindex=" + this.pageIndex)
        .then(res => {
            console.log(res.data)
          if (res.data.status === 0) {
            // this.comments = res.data.message;
            // 每当获取新评论数据的时候，不要把老数据清空覆盖，而是应该以老数据，拼接上新数据
            this.comments = this.comments.concat(res.data.message);
          } else {
            Toast("获取评论失败！");
          }
        });
    },
  getMore() {
        // 加载更多
      this.pageIndex++;
      this.getComments();
    },
    postComment(){
      if(this.msg.trim().length === 0){
        return Toast("评论内容不能为空！")
      }
    this.$http.post('http://027xin.com:8899/api/postcomment/' + this.$route.params.id,{
      content:this.msg.trim()
    }).then(res => {
      // console.log(res.data)
      if(res.data.status === 0){
        var cmt = {
            user_name: "匿名用户",
            add_time: Date.now(),
            content: this.msg.trim()
          };
          this.comments.unshift(cmt);
          this.msg = "";
      }
    })
  },
  },
  props: ["id"]
};
</script>
<style>
.cmt-container h3{
    font-size: 18px;
}
.cmt-container textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
}
.cmt-container .cmt-list{
    margin: 5px 0;
}
.cmt-container .cmt-list .cmt-item{
      font-size: 13px;
}
.cmt-container .cmt-list .cmt-item .cmt-title {
    line-height: 30px;
    background-color: #ccc;
    }
.cmt-container .cmt-list .cmt-item .cmt-body {
    line-height: 35px;
    text-indent: 2em;
}
</style>
